<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>iframe dom 操作测试</title>
  </head>
  <body>
    <script src="https://cdn.staticfile.org/jquery/2.0.0/jquery.min.js"></script>
    <iframe
      id="iframeWraper"
      src="https://emdatah5.eastmoney.com/dc/nxfxb/index"
      frameborder="0"
      frameborder="0"
      style="width: 100%; height: 900px"
    ></iframe>
    <script>
      $('#iframeWraper').contents().find('.common-header2');
    </script>
  </body>
</html>
